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Re: [PATCH] Replace vdelta with singel insert op (was: [PATCH] Replace vdelta with xdelta variant)

From: Branko Čibej <brane_at_xbc.nu>
Date: Thu, 24 Jan 2008 12:26:05 +0100

David Glasser wrote:
> On Jan 22, 2008 9:07 AM, Branko Čibej <brane_at_xbc.nu> wrote:
>
>> Bah. --pre-1.4.x-compatible is for old clients accessing via file://.
>> svndiff0 over the wire is for old clients, period. I think burning that
>> bit all the way through our APIs is more hassle than upgrading clients.
>>
>
> I'll buy that for the FS; although it's also for "old repositories who
> haven't done a dump and load, the only officially supported way of
> upgrading repository format", I suspect that 1.5 will require an
> "svnadmin upgrade" command anyway.
>

IMHO the inconvenience of forcing an upgrade of clients that access the
repository locally is mitigated by the fact that they /do/ access the
repository locally, in other words, it's quite likely that you'll have
complete control over the client version when you upgrade the server and
the repository.

> Do we have actual numbers on client versions anywhere? It wasn't long
> ago that it was uncommon to find 1.4 in stable versions of various
> distributions.
>

I don't think that's so important. Remember that we never send actual
data from the repo to the client; it's always munged and deltas
recomputed in some way. So this over-the-net slowdown would only affect
pre-1.4 clients talking to a 1.5 server during initial checkout, when we
can't send deltas.

-- Brane

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Received on 2008-01-24 12:47:19 CET

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